CVE-2025-66131 identifies a critical missing authorization vulnerability in the Yaad Sarig Payment Gateway plugin for WooCommerce, affecting versions up to 2.2.10. This vulnerability arises from incorrectly configured access control security levels, allowing unauthenticated remote attackers to bypass authorization mechanisms. The flaw enables attackers to perform unauthorized actions within the payment gateway, potentially accessing or manipulating sensitive payment data. The CVSS 3.1 base score of 9.1 reflects a network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The scope is unchanged (S:U), but confidentiality and integrity impacts are high (C:H/I:H), while availability is unaffected (A:N). This means attackers can fully compromise the confidentiality and integrity of payment transactions without needing to authenticate or trick users. The vulnerability affects the Yaad Sarig Payment Gateway for WooCommerce, a plugin used to integrate payment processing into WooCommerce-based e-commerce sites. As payment gateways handle sensitive financial data and transactional integrity, exploitation could lead to unauthorized transactions, data theft, and financial fraud. Although no public exploits are currently known, the critical severity and ease of exploitation make this a high-risk vulnerability. The lack of available patches at the time of publication necessitates immediate attention from affected organizations to monitor and prepare for remediation. The vulnerability was reserved on 2025-11-21 and published on 2025-12-16, indicating recent discovery and disclosure.

For European organizations, this vulnerability poses a significant risk to e-commerce platforms using WooCommerce with the Yaad Sarig Payment Gateway plugin. Exploitation could lead to unauthorized access to payment processing functions, resulting in financial fraud, theft of sensitive customer payment information, and manipulation of transaction data. This can cause direct financial losses, regulatory non-compliance (e.g., GDPR violations due to data breaches), and severe reputational damage. The integrity of payment data is critical for trust in online commerce; thus, any compromise can undermine customer confidence and lead to loss of business. Additionally, organizations may face legal and financial penalties if payment data is exposed or misused. The ease of exploitation without authentication or user interaction increases the threat level, especially for publicly accessible e-commerce sites. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the potential for rapid weaponization by attackers. European organizations should consider this vulnerability a high priority due to the critical nature of payment gateways in their digital infrastructure.

1. Immediate action should be to monitor for official patches or updates from the Yaad Sarig Payment Gateway vendor and apply them as soon as they become available. 2. Until patches are released, restrict network access to the payment gateway endpoints by implementing firewall rules or web application firewall (WAF) policies to limit exposure to trusted IP addresses only. 3. Conduct thorough access control reviews and audits of the WooCommerce environment to ensure no excessive permissions are granted and that security configurations follow best practices. 4. Enable detailed logging and monitoring of payment gateway activities to detect any suspicious or unauthorized access attempts promptly. 5. Employ intrusion detection/prevention systems (IDS/IPS) tuned to detect anomalous behavior related to payment processing. 6. Educate the security and IT teams about this vulnerability to ensure rapid response capability. 7. Consider temporary disabling or replacing the affected payment gateway plugin with a more secure alternative if patching is delayed. 8. Regularly back up e-commerce data and payment configurations to enable quick recovery in case of compromise. 9. Coordinate with payment processors and financial institutions to monitor for fraudulent transactions. 10. Review and update incident response plans to include scenarios involving payment gateway compromise.